/*
 * UltraStar Deluxe - Karaoke Game
 *
 * UltraStar Deluxe is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; see the file COPYING. If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 *
 */

#include <cstddef>

#include "background_image.hpp"
#include "drawable_control.hpp"
#include "utils/activator.hpp"

namespace usdx
{
	BackgroundImage::BackgroundImage(const DrawableControl &control,
									 boost::filesystem::wpath filename) :
		Background(control), texture(NULL), size(0,0)
	{
		texture = new Disposer<Texture>(new Texture(filename));
	}

	BackgroundImage::~BackgroundImage()
	{
		if (texture != NULL) {
			delete texture;
			texture = NULL;
		}
	}

	void BackgroundImage::updateVertices() {
		vertices[0] = 0;
		vertices[1] = get_parent().get_height();
		vertices[2] = get_parent().get_width();
		vertices[3] = get_parent().get_height();
		vertices[4] = get_parent().get_width();
		vertices[5] = 0;
		vertices[6] = 0;
		vertices[7] = 0;
	}

	void BackgroundImage::draw(void)
	{
		if (size != get_parent().get_size()) {
			this->updateVertices();
			size = get_parent().get_size();
		}

		Activator t(texture->get());

		glEnableClientState(GL_VERTEX_ARRAY);
		glEnableClientState(GL_TEXTURE_COORD_ARRAY);

		glVertexPointer(2, GL_INT, 0, vertices);
		glTexCoordPointer(2, GL_FLOAT, 0, Texture::default_vertices);

		glDrawArrays(GL_QUADS, 0, 4);

		glDisableClientState(GL_VERTEX_ARRAY);
		glDisableClientState(GL_TEXTURE_COORD_ARRAY);
	}
};